Efficiency Improvement for Motor-Pump Set of a Wind Energy Pumped Storage System Using V/FX Fuzzy Controller

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Efficiency Improvement for Motor-Pump Set of a Wind Energy Pumped Storage System Using V/FX Fuzzy Controller

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Title: Efficiency Improvement for Motor-Pump Set of a Wind Energy Pumped Storage System Using V/FX Fuzzy Controller
Author: M.A.S. Mahmoud, Muhammad
Abstract: In this paper we shall focus on the pump storage systems as an important application for wind energy as the pumped storage systems are more and more involved in renewable energy at high power levels. But at the same time, pumped storage can be successfully used for grid integration of small scale renewable energy sources, such as wind energy. The purpose of this paper is to design optimum fuzzy motor controller for pump driving in order to obtain maximum power available for pumping and minimum motor losses, and hence, a higher efficiency of the pump. Two fuzzy motor controllers based on linear dependency (V/Hz) and cubic dependency (V/Hz3) between voltage and frequency are developed for induction machine in pumped storage applications. The fuzzy controller is designed to receive frequency input from the network and estimate the required firing angle of a full-wave Thyristor circuit placed between the source and the load to control the load voltage. The fuzzy controllers have considered the variation of the power supply frequency during the motor starting and running cases to select the optimum applied voltage to the motor for both cases. Simulation of the motor operation during the starting and running is carried out for the full applicable range of frequency. The results and the detailed graphs show how the designed controller is fast and accurate. Required motor protection and comparison between DC link and Thyristor full wave circuit control has been discussed as well.
URI: http://hdl.handle.net/123456789/1860
Date: 2012


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